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author | 2018-01-16 16:03:58 +0400 | |
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committer | 2018-02-12 10:59:19 +0200 | |
commit | 9e95a66cce7250c358d496e1c3b62e29ce79ef40 (patch) | |
tree | c80b1cf6d35b0f9fbe8e168c46ca9f69c9ac6d11 /drivers/usb/dwc2 | |
parent | usb: dwc2: Add safety check in setting of descriptor chain pointers (diff) | |
download | linux-9e95a66cce7250c358d496e1c3b62e29ce79ef40.tar.gz linux-9e95a66cce7250c358d496e1c3b62e29ce79ef40.tar.bz2 linux-9e95a66cce7250c358d496e1c3b62e29ce79ef40.zip |
usb: dwc2: Add safety check for STSPHSERCVD intr
STSPHSERCVD (status phase received) interrupt should be
handled when EP0 is in DWC2_EP0_DATA_OUT state.
Sometimes STSPHSERCVD interrupt asserted , when EP0
is not in DATA_OUT state. Spurios interrupt.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r-- | drivers/usb/dwc2/gadget.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 57c7400057fa..d6222e946463 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2976,9 +2976,13 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx, if (ints & DXEPINT_STSPHSERCVD) { dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__); - /* Move to STATUS IN for DDMA */ - if (using_desc_dma(hsotg)) - dwc2_hsotg_ep0_zlp(hsotg, true); + /* Safety check EP0 state when STSPHSERCVD asserted */ + if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) { + /* Move to STATUS IN for DDMA */ + if (using_desc_dma(hsotg)) + dwc2_hsotg_ep0_zlp(hsotg, true); + } + } if (ints & DXEPINT_BACK2BACKSETUP) |